JP7097417B2 - Fire detector - Google Patents

Description

The present invention relates to a fire detector provided in a storage box installed in a tunnel to detect a fire.

Conventionally, in tunnels such as expressways and motorways, fire detectors are installed along the side walls of the tunnel at intervals of, for example, 50 m in order to monitor flames caused by vehicle fires. The fire detector monitors radiation from fire flames generated in the tunnel, such as infrared rays, through a translucent light receiving glass window, has detection areas in both the left and right directions, and runs along the longitudinal direction of the tunnel. , The detection areas of the adjacent fire detectors are continuously arranged so as to overlap each other in a complementary manner.

When such a fire detector is installed in a tunnel, the storage box containing the fire detector is fixed to the wall surface of the concrete skeleton by using anchor bolts.

Japanese Unexamined Patent Publication No. 2002-015393 Japanese Unexamined Patent Publication No. 2004-355664 No. 47-035983 Japanese Unexamined Patent Publication No. 2002-024955 US Patent Application Publication No. 2013/0031957 International Publication No. 2015/090749 Japanese Unexamined Patent Publication No. 02-031877

By the way, the fire detector installed in the tunnel monitors the dirt on the light-receiving glass window because the dirt on the light-receiving glass window increases with the passage of time due to the adhesion of pollutants floating in the environment.

To monitor the dirt on the light-receiving glass window, the test light is periodically emitted from the test light source provided in the fire detector to the light-receiving glass window via the space on the detection area side outside the detector, and is received by the internal light-receiving element. By comparing the light receiving level at that time with that at the time of initial stain-free, dirt compensation is performed to correct the decrease in the light receiving level due to dirt, and the dimming rate indicating the degree of dirt is obtained, and the dimming rate is a predetermined dirt. When the threshold is exceeded, a dirt alarm is output.

In addition, since the fire detector installed in the tunnel becomes dirty with the light-receiving glass window over time, the light-receiving glass window is cleaned at regular intervals.

However, the cleaning work of the light receiving glass window needs to be performed by restricting the passage of the tunnel, and there is a problem that it takes time and effort to clean the light receiving glass window for each fire detector. Furthermore, the degree of dirt progress on the light receiving glass window varies depending on the installation location of the fire detector and the direction of the wind, and how much dirt progresses in a certain period until cleaning depends on the fire detector itself and the fire detector. Depending on the left and right of the translucent window provided in the fire detector, unnecessary cleaning work may be required for a fire detector with a small degree of dirt progress.

It is an object of the present invention to provide a fire detector capable of eliminating traffic restrictions and work load due to cleaning work by eliminating dirt on the light receiving glass window due to adhesion of pollutants floating in the environment.

(Part 2: Cleaning of the detector cover and removal of dirt by blowing air)
The present invention is a fire detector attached to a storage box installed in a tunnel and observing radiation energy radiated from a combustion flame incident through a light receiving glass window to detect a fire in a monitoring area.
A detector cover that covers the outside of the front of the storage box and has at least a predetermined part facing the light receiving glass window as a transparent part.
Water supplied from the water injection nozzle to the surface of the cover including the transparent part of the detector cover through a pipe that is branched and connected to the water supply pipe of the fire hydrant device is sprayed by opening the solenoid valve arranged in the middle of the pipe. Cleaning mechanism to clean
A blower mechanism that blows air to at least the part of the cover surface where the water spray nozzle sprays water,
A control unit that drives the ventilation mechanism for a predetermined time after the cleaning mechanism opens and closes the solenoid valve.
Equipped with
The blower mechanism is characterized by being provided with a heater for heating the air to be blown .

(Second invention No. 3: Cleaning of the detector cover and removal of dirt by blowing air)
The present invention is a fire detector attached to a storage box installed in a tunnel and observing radiation energy radiated from a combustion flame incident through a light receiving glass window to detect a fire in a monitoring area.
A detector cover that covers the outside of the front of the storage box and has at least a predetermined part facing the light receiving glass window as a transparent part.
A cleaning mechanism that injects water from a water injection nozzle to clean the surface of the cover including the transparent part of the detector cover,
An air blower that sends out air and an air supply unit that supplies air from the air blower to the cover surface are arranged in the storage box, and the air supplied from the air supply unit to at least the part of the cover surface where the water injection nozzle injects water. With a ventilation mechanism that blows almost evenly ,
A control unit that drives the ventilation mechanism for a predetermined time after the water injection by the cleaning mechanism is completed .
It is characterized by being equipped with .

(7th Invention No. 2: Cleaning of the light receiving glass window and removal of dirt by blowing air)
The present invention is a fire detector that is attached to a storage box installed in a tunnel and detects a fire in a monitoring area by observing radiation energy radiated from a combustion flame incident through a plurality of light receiving glass windows. hand,
A cleaning mechanism that injects water supplied from a water injection nozzle to the surface of the light receiving glass window through a pipe that is branched and connected to the water supply pipe of the fire hydrant device by opening the solenoid valve located in the middle of the pipe to clean it.
A ventilation mechanism that blows air onto the surface of the light-receiving glass window,
A control unit that drives the ventilation mechanism for a predetermined time after the cleaning mechanism opens and closes the solenoid valve.
Equipped with
The cleaning mechanism is equipped with multiple water injection nozzles corresponding to each of the multiple light receiving glass windows.
The blower mechanism is characterized by including a plurality of blower supply units corresponding to each of the plurality of light receiving glass windows .

(7th Invention No. 3: Cleaning of light-receiving glass window and removal of dirt by blowing air)
The present invention is a fire detector that is attached to a storage box installed in a tunnel and detects a fire in a monitoring area by observing radiation energy radiated from a combustion flame incident through a plurality of light receiving glass windows. hand,
A cleaning mechanism that injects water from a water injection nozzle to clean the surface of the light receiving glass window,
A ventilation mechanism that blows air supplied from the air supply unit to the surface of the light receiving glass window by arranging a ventilation unit that sends out air and an air supply unit that supplies air from the air supply unit to the surface of the light receiving glass window in the storage box.
A control unit that drives the ventilation mechanism for a predetermined time after the water injection by the cleaning mechanism is completed.
Equipped with
The cleaning mechanism is equipped with multiple water injection nozzles corresponding to each of the multiple light receiving glass windows.
The blower mechanism is characterized by including a plurality of blower supply units corresponding to each of the plurality of light receiving glass windows .

(Part 2: Effect of cleaning the detector cover and removing dirt by blowing air)
The present invention is a fire detector attached to a storage box installed in a tunnel and observing radiation energy radiated from a combustion flame incident through a light receiving glass window to detect a fire in a monitoring area. A detector cover that covers the outside of the front surface of the storage box and has at least a predetermined part facing the light receiving glass window as a transparent part, and a cover surface including the transparent part of the detector cover from a water injection nozzle to a fire extinguisher device. A cleaning mechanism that injects and cleans water supplied through a pipe that is branched and connected to the water supply pipe by opening the electromagnetic valve located in the middle of the pipe, and a part of the cover surface where at least the water injection nozzle injects water. A blower mechanism for blowing air into the glass and a control unit for driving the blower mechanism for a predetermined time after the cleaning mechanism opens and closes the electromagnetic valve, and the blower mechanism is provided with a heater for heating the blown air. By injecting water onto the cover surface of the detector cover by the cleaning mechanism every period to dry or blow off the water adhering by the blower mechanism, it is possible to remove the dirt adhering up to that point, which is practically By eliminating the adhesion of dirt, the attenuation of incident light due to dirt is eliminated, the initial flame detection performance can be maintained continuously, and since dirt does not adhere, fire detectors with tunnel traffic restrictions Cleaning work is not required, maintenance is easy and cost can be reduced, and a transparent detector cover is placed to cover the outside of the fire detector, and the cover surface is cleaned to wipe off dirt. Therefore, it is possible to install the existing fire detector as it is in the fire extinguisher device to eliminate the influence of dirt.

In addition, since dirt does not adhere, cleaning work of the fire detector with tunnel traffic regulation is not required, maintenance is easy, and cost can be reduced.

In addition, since a transparent detector cover is placed to cover the outside of the fire detector and the cover surface is cleaned to wipe off dirt, the existing fire detector is placed in the storage box as it is and becomes dirty. It is possible to eliminate the influence of.

Since the effect of the fire detector of the second invention No. 3 is the same as the effect of the fire detector of the second invention No. 2 described above, the description thereof will be omitted.

(7th Invention No. 2: Effect of cleaning the light receiving glass window and removing stains by blowing air)
The present invention is a fire detector that is attached to a storage box installed in a tunnel and detects a fire in a monitoring area by observing radiation energy radiated from a combustion flame incident through a plurality of light receiving glass windows. Then, the water supplied from the water injection nozzle to the water supply pipe of the fire extinguishing plug device, which is branched and connected to the surface of the light receiving glass window, is sprayed and cleaned by opening the electromagnetic valve arranged in the middle of the pipe. The cleaning mechanism includes a mechanism, a blowing mechanism that blows air onto the surface of the light receiving glass window, and a control unit that drives the blowing mechanism for a predetermined time after the cleaning mechanism opens and closes the electromagnetic valve . It is equipped with a plurality of water injection nozzles corresponding to each of the glass windows, and the blower mechanism is provided with a plurality of blower supply units corresponding to each of the plurality of light receiving glass windows. By spraying water to dry or blow off the adhering moisture by the ventilation mechanism, it is possible to remove the dirt adhering up to that point, and by virtually eliminating the adhering dirt, the light receiving glass window becomes dirty. It eliminates the attenuation of incident light due to the glass, makes it possible to maintain the initial flame detection performance continuously, and because dirt does not adhere, it does not require regular cleaning work of the fire detector with tunnel traffic restrictions. It is easy to manage and the cost can be reduced.

In addition, since dirt does not adhere, cleaning work of the fire detector with tunnel traffic regulation is not required, maintenance is easy, and cost can be reduced.

Since the effect of the fire detector of the seventh invention No. 3 is the same as the effect of the fire detector of the seventh invention No. 2 described above, the description thereof will be omitted.

Further, the cleaning mechanism of the second invention No. 2 and the seventh invention No. 2 includes a cleaning pipe branched from the water supply pipe to the fire hydrant device and connected to the water injection nozzle, and an electromagnetic valve provided in the middle of the cleaning pipe. By using the water filled in the water supply pipe for the fire hydrant device for cleaning, it is not necessary to prepare a separate supply source, and it is possible to efficiently use the water resources of the fire hydrant device to clean the dirt. do.

Explanatory drawing which showed the 1st Embodiment of the fire detector by this invention by the front surface and the plane cross section. Explanatory drawing which showed the fire detector of FIG. 1 by the side cross section Explanatory drawing showing the internal built-in structure by removing the box cover of the fire detector of FIG. Perspective view showing the fire detector taken out Explanatory view showing the assembled and disassembled state of the fire detector mounting part of FIG. 1 from a plane. Explanatory view showing the assembled and disassembled state of the fire detector mounting part of FIG. 1 from the side. Explanatory drawing showing the front and the plane with the detector cover taken out Explanatory drawing showing the outline of the tunnel disaster prevention system equipped with a fire detector Time chart showing cleaning control of multiple fire detectors A time chart showing the water injection signal and wiper drive signal used for one-time cleaning control of the fire detector. Explanatory drawing which showed the 2nd Embodiment of the fire detector which provided the wiper mechanism and the blower mechanism in the detector cover by the front surface and the plane cross section. Explanatory drawing which showed the 3rd Embodiment of the fire detector which provided only the cleaning mechanism in the detector cover. Explanatory drawing which showed the 4th Embodiment of the fire detector which provided only the blower mechanism in the detector cover. Explanatory drawing which showed the 5th Embodiment of the fire detector which provided the film slide mechanism in the detector cover from the front and the plane. Explanatory drawing which took out the detector cover of 5th Embodiment and showed from the front, the plane and the cross section. Explanatory drawing which showed the sixth embodiment of the fire detector which provided the cleaning mechanism and the wiper mechanism in the light receiving glass window. Explanatory drawing which showed the 7th Embodiment of the fire detector which provided the cleaning mechanism and the ventilation mechanism in the light receiving glass window. Explanatory drawing which showed the 8th Embodiment of the fire detector which provided only the cleaning mechanism in the light receiving glass window. Explanatory drawing which showed the 9th Embodiment of the fire detector which provided only the ventilation mechanism in the light receiving glass window.

[Outline of Embodiment of the present invention]
The embodiment of the fire detector according to the present invention is an embodiment of removing dirt on the surface of a transparent detector cover provided so as to cover the fire detector arranged in the storage box, and dirt on the light receiving glass window of the fire detector. It is roughly classified into embodiments for direct removal.

The former embodiment for removing stains on the detector cover includes the first to fifth embodiments described below, and the latter embodiment for directly removing stains on the light receiving glass window will be described below. Sixth to ninth embodiments are included.

[First Embodiment of Fire Detector]
FIG. 1 is an explanatory view showing a first embodiment of the fire detector according to the present invention in front and plane cross sections, FIG. 2 is an explanatory view showing the fire detector in FIG. 1 in side cross sections, and FIG. 3 is a fire in FIG. An explanatory view showing the internal built-in structure with the box cover of the detector removed, and FIG. 4 is a perspective view showing the fire detector taken out.

(Mounting structure for the storage box of the fire detector)
As shown in FIGS. 1 to 3, the storage box 10 is installed on a tunnel wall surface, a ceiling, or the like, and the fire detector 12 of the present invention is mounted inside the storage box 10 with the front panel 10a removed. By mounting the front panel 10a after mounting, only the front portion of the fire detector 12 protrudes from the front panel 10a.

As shown in FIG. 4, the fire detector 12 is composed of a cover 12a and a detector main body 12b, and a light receiving glass window 14 is provided on each of the two inclined surfaces of the cover 12a on the left and right sides. A fire is detected by a pyroelectric element having sensitivity in a predetermined wavelength band installed inside the 14. Further, a test light source accommodating portion 16 is provided so as to project above the light receiving glass window 14.

As shown in FIGS. 2 and 3, the mounting frame 24 is fixed to the inner back surface of the storage box 10, and the flange portions 12c protruding to the left and right of the bottom of the detector main body 12b are fastened and fixed to the mounting frame 24 with bolts. As a result, the fire detector 12 is mounted and fixed in the storage box 10.

For the fire detector 12 installed in the storage box 10, the lead-in signal line 20a from the disaster prevention receiving panel installed in the monitoring center or the like is pulled in, and the pull-out signal line 20b for the next fire detector is pulled out. Further, a signal line 20c for a detector connected to the fire detector 12 by a waterproof connector 18 is routed, and these three signal lines are connected by a crimp connection portion 22 and covered with a plastic bag to cover a binder wire. It is rolled and fixed.

(Fire detector dirt removal structure)
As shown in FIGS. 1 to 3, the fire detector 12 arranged so as to protrude from the front panel 10a of the storage box 10 has light-receiving glass windows 14 provided on the left and right sides of the front in a state of being installed on the side wall of the tunnel. The monitoring area through the storage box 10 is set to a range of, for example, 50 meters in front of the left and right sides of the storage box 10.

A detector cover 26 made of a transparent synthetic resin or the like is attached to the front panel 10a, and a light receiving glass window 14 is provided on the front surface of the fire detector 12 exposed on the front surface of the storage box 10 by the detector cover 26. It covers the part. For this reason, the light receiving glass window 14 is isolated from the environmental space in which the polluted substances are floating in the tunnel by the detector cover 26, so that the polluted substances are not polluted due to the adhesion of the polluted substances.

The detector cover 26 is provided with a water injection nozzle 40 and a wiper mechanism 30 that form a cleaning mechanism.

The cleaning mechanism stands the water injection nozzle 40 at a position near the corner on the lower right side of the detector cover 26, that is, at a position that does not interfere with the monitoring area of the fire detector 12, and the light receiving glass of the fire detector 12 Pressurized water is sprayed onto the cover surface of the detector cover 26 including the region facing the window 14, so that the adhered dirt can be washed.

The pressurized water jetted from the water injection nozzle 40 uses the pressurized water taken out from the water supply pipe that supplies fire extinguishing water to the fire hydrant device installed in the tunnel from the fire extinguishing pump equipment, and is drawn into the box body 10b from the bottom by the water supply pipe 46. There is. The water supply pipe 46 drawn into the box body 10b is connected to the root of the nozzle shaft 42 via the solenoid valve 48. As a result, the solenoid valve 48 is opened and driven prior to the operation of the wiper mechanism 30, so that pressurized water is supplied to the water injection nozzle 40 by the water supply pipe 46 and sprayed onto the cover surface for cleaning.

Here, the diameter of the water supply pipe 46 that is branched from the water supply main to the storage box 10 is, for example, a thin pipe of about several millimeters, and is injected from the water injection nozzle 40 by one cleaning by driving the electromagnetic valve 48 open. The amount of water to be applied is as small as 1 liter or less, and with this amount of water injection, the pressure drop of the pressurized water supplied by, for example, a water supply main of several hundred millimeters can be suppressed to a very small amount.

For this reason, even if the water resources from the water supply main are used to clean the dirt in the storage box 10, the water leakage level will remain at the level normally planned, and the automatic operation of the fire extinguishing pump equipment that recovers to the specified pressure against the pressure drop will result in a tunnel. Even if the cleaning operations of the plurality of storage boxes 10 installed in the water supply pipe are sequentially performed, the pressure inside the water supply pipe is always maintained at the specified pressure.

The wiper mechanism 30 raises the shaft case 34 at a position near the corner on the upper left side of the detector cover 26, that is, at a position that does not interfere with the monitoring area of the fire detector 12, and fixes it to the mounting frame 24 in the box body 10b. The wiper drive shaft 35 of the wiper motor 32 is taken out forward through the shaft case 34, the base of the wiper arm 36 is fixed to the tip of the wiper drive shaft 35, and the wiper blade 38 fixed to the tip side of the wiper arm 36 is covered. It is in contact with the surface.

When the wiper motor 32 is operated by supplying power, the wiper arm 36 is illustrated by rotating the wiper motor 32 to reverse the rotation direction of the wiper drive shaft 35 within a predetermined rotation angle, for example, a rotation angle of about 90 °. Swings between the horizontal initial position of the wiper arm 36a and the rotation position of the wiper arm 36a diagonally downward, and the wiper blade 38 wipes the area of the cover surface including the area facing the light receiving glass window 14 to wipe off dirt. I am doing it.

The wiper motor 32 used in the present embodiment uses a motor having a turning pole structure that switches the switch contact at a predetermined rotation angle to switch the rotation direction. Instead of the wiper motor 32 provided with the repolarization structure, a known wiper link mechanism may be used to convert the rotation of the motor into the swing motion of the wiper arm.

Further, a controller 50 is installed in the box body 10b, and the signal line 52 from the disaster prevention receiving panel is connected to the controller 50, and the wiper motor 32 and the solenoid valve 48 are connected by the signal line.

The controller 50 provided to control the wiper motor 32 and the solenoid valve 48 is connected to the signal line 52 from the disaster prevention receiving panel installed in the monitoring center or the like. The disaster prevention receiver is equipped with a control unit function that controls dirt removal, outputs a control signal at predetermined periods such as one week or 10 days, and detects pressurized water from the water injection nozzle 40 by controlling the opening and closing of the solenoid valve 48. The cover surface of the vessel cover 26 is sprayed to clean it, and then the wiper motor 32 is driven to wipe off the dirt on the cover surface.

(Assembled structure for storage box)
5 is an explanatory view showing the assembled / disassembled state of the fire detector mounting portion of FIG. 1 from a plane, FIG. 6 is an explanatory view showing the assembled / disassembled state of the fire detector mounting portion of FIG. 1 from the side, and FIG. 7 is a detection. It is explanatory drawing which took out the vessel cover and showed the front and the plane.

As shown in FIGS. 5 and 6, the equipment and members including the fire detector 12 and the detector cover 26 can be assembled to the storage box 10 from the front of the storage box 10.

First, the mounting frame 24 is fixed in the box body 10b of the storage box 10, the wiper motor 32 of the wiper mechanism 30 is fixed on the upper part of the mounting frame 24, and the wiper drive shaft 35 is taken out forward through the shaft case 34. Further, the rear end of the nozzle shaft 42 is fixed to the mounting frame 44 fixed to the lower side of the box body 10b, the water supply pipe 46 is connected to the back, and the water injection nozzle 40 attached to the tip of the nozzle shaft 42 is designated in front. It is taken out to the position. The water injection nozzle 40 is a cylindrical member, and has a nozzle hole on the side surface of the cylinder.

Subsequently, the fire detector 12 is incorporated into the box body 10b from the front, bolts 15 are passed through the flange portions 12c protruding to the left and right of the bottom, and the fire detector 12 is fastened and fixed to the screw holes of the mounting frame 24.

Next, the front panel 10a of the storage box 10 is fitted, and the four corners are fixed with screws 11. The front panel 10a has a detector storage hole 10d formed in the center, and a through hole is formed at a position corresponding to the shaft case 34 and the nozzle shaft 42.

Subsequently, the detector cover 26 is attached, and the four corners are fixed by the screws 27. The detector cover 26 has a box-shaped cover body 26a formed in the center and a mounting frame portion 26b integrally formed around the inside of the cover body 26a, as shown in the front surface and the flat surface taken out in FIG. A nozzle through hole 26c is formed on the lower right corner side of the mounting frame portion 26b, and a recess 26d through which the nozzle shaft 42 is passed is formed on the side surface portion of the cover main body 26a facing the nozzle through hole 26c. Further, a shaft through hole 26e is formed on the upper left corner side of the mounting frame portion 26b, and a recess 26f through which the shaft case 34 is passed is formed on the side surface portion of the cover main body 26a facing the shaft through hole 26e. Further, through holes 26g for fixing are formed at the four corners of the mounting frame portion 26b.

As shown in FIGS. 5 and 6 again, finally, the base of the wiper arm 36 is attached to the wiper drive shaft 35 protruding from the tip of the shaft case 34 and fixed by the screw 37 to complete the assembly. do.

As described above, the fire detector 12, the detector cover 26, and the wiper arm 36 can be easily and easily assembled to the storage box 10 from the front of the storage box 10.

(Tunnel disaster prevention system and dirt removal control)
FIG. 8 is an explanatory diagram showing an outline of a tunnel disaster prevention system equipped with a fire detector, FIG. 9 is a time chart showing cleaning control of a plurality of fire detectors, and FIG. 10 is a one-time cleaning control of fire detectors. It is a time chart which showed the water injection signal and the wiper drive signal to use.

As shown in FIG. 8, an up line tunnel 1a and a down line tunnel 1b are constructed as tunnels for a motorway, and the up line tunnel 1a and the down line tunnel 1b are connected by an evacuation connecting pit 2.

Inside the up line tunnel 1a and the down line tunnel 1b, storage boxes 10 to which fire detectors 12 are attached are installed at intervals of 50 meters along the wall surface in the longitudinal direction of the tunnel. The fire detector 12 provided in the storage box 10 sets monitoring areas on both sides of 50 meters on the left and right, detects a flame caused by a fire, and issues a fire.

As an emergency facility in the tunnel, in addition to the fire detector 12 and the fire detector 12, a fire hydrant device, a manual notification device, an emergency telephone, and a water spray facility that protects the tunnel frame from fire by sprinkling water from a water injection nozzle. Etc. are installed, but the illustration is omitted.

A disaster prevention receiving board 60 is installed in a monitoring center or the like in order to monitor an abnormality in the tunnel. From the disaster prevention receiver board 60, in the up line tunnel 1a and the down line tunnel 1b, the inside of the tunnel is divided into a section divided in the longitudinal direction and a type of terminal equipment, for example, a plurality of P-type signal lines are drawn out. Terminal devices such as a fire detector 12 provided in the storage box 10, a transmitter (manual notification device) provided in the storage box 10, and a fire hydrant valve open / close detection switch are connected.

Further, as emergency facilities for the tunnel, fire extinguishing pump equipment 62, IG slave station equipment 64, ventilation equipment 66, alarm display board equipment 68, radio rebroadcasting equipment 70, television monitoring equipment 72, lighting equipment 74, etc. are provided. It is individually connected to the disaster prevention receiver 60 by a P-type signal line. Here, the IG slave station equipment 64 is a communication equipment that connects the disaster prevention receiving panel 60 and the remote monitoring and control equipment 76, which is a higher-level equipment provided outside, via a network.

As shown in FIGS. 9A to 9E, the disaster prevention receiving panel 60 removes dirt from the controllers 50 of the plurality of storage boxes 10 installed in the tunnel at predetermined time intervals as shown in FIGS. 9A to 9E. The control signals for are sequentially transmitted.

The controller 50 of the storage box 10 that has received the control signal from the disaster prevention receiving panel 60 outputs the water injection signal three times in succession and opens and closes the electromagnetic valve 48 three times, for example, as shown in FIG. 10 (A). As a result, pressurized water is sprayed from the water injection nozzle 40 onto the cover surface of the detector cover 26 in three steps to clean the dirt, and then the wiper drive signal shown in FIG. 10B is output for a predetermined time. The wiper motor 32 is driven, and dirt wet by water spraying on the cover surface is removed by wiping with the wiper mechanism 30, and this is repeated, for example, twice.

Therefore, the dirt adhering to the surface of the detector cover 26 is removed by cleaning by spraying pressurized water and wiping the wiper, and by substantially eliminating the dirt adhering, the incident light incident on the fire detector 12 due to the dirt is attenuated. Eliminates and makes it possible to continuously maintain the initial flame detection performance.

In addition, since dirt does not adhere, cleaning work of the fire detector with tunnel traffic regulation is not required, maintenance is easy, and cost can be reduced. Further, since the transparent detector cover 26 is placed so as to cover the outside of the fire detector 12 and the cover surface is cleaned to wipe off the dirt, the existing fire detector is installed in the fire hydrant device as it is. , It is possible to eliminate the influence of dirt.

Furthermore, by using the pressurized water filled in the water supply pipe for the fire hydrant device for cleaning the detector cover 26, it is not necessary to separately prepare a supply source for the pressurized water, and the water resources of the fire hydrant device are efficiently used. Enables dirt cleaning.

By mixing the cleaning liquid with the pressurized water ejected from the water injection nozzle 40 and injecting the cleaning liquid, it may be easier to remove the dirt.

[Second embodiment of a fire hydrant device provided with a fire detector]
FIG. 11 is an explanatory view showing a second embodiment of a fire detector in which a wiper mechanism and a blower mechanism are provided on a detector cover by a front view and a plan view.

As shown in FIGS. 11, in the second embodiment of the present invention, the point that the transparent detector cover 26 is arranged so as to cover the front surface of the fire detector 12 attached to the storage box 10 is shown in FIGS. 1 to 7. It is the same as the first embodiment, but is characterized in that a cleaning mechanism provided with a water injection nozzle 40 and a blowing mechanism 90 are provided as a configuration for removing dirt.

The cleaning mechanism is the same as that of the first embodiment, and the water injection nozzle 40 is provided at the tip at a position near the corner on the lower right side of the detector cover 26, that is, a position that does not interfere with the monitoring area of the fire detector 12. The nozzle shaft 42 is fixed to the mounting frame 44 and stands upright, the water supply pipe 46 is connected to the rear end of the nozzle shaft 42, and the electromagnetic valve provided in the middle of the water supply pipe 46 is opened and driven to supply water to the fire extinguishing plug device. Clean by spraying pressurized water from the pipe onto the cover surface.

The blower mechanism 90 arranges the blower unit 92 at the upper part that does not obstruct the monitoring area of the fire detector 12, and forms a slit-shaped outlet 100 downward side by side at the tip of the blower unit 92, and forms the blower unit 92 side by side. The rear portion is connected to the air outlet of the blower fan 94 fixed to the mounting frame 24 via the blower hose 96.

Further, a straightening vane 98 that spreads in a substantially fan shape and then goes straight from the inlet side to which the blower fan 94 of the blower unit 92 is connected toward the outlet side forming the plurality of outlets 100 is arranged, and the wind blown from the blower fan 94. Is made to go toward each outlet 100 almost evenly.

Similar to the case of the first embodiment, the cleaning mechanism receives a control signal transmitted from the disaster prevention receiving panel at predetermined intervals by the controller, and the controller opens and closes the solenoid valve to drive the water injection nozzle 40. Pressurized water is sprayed onto the cover surface of the detector cover 26 for cleaning.

Subsequently, the controller drives the blower fan 94 for a predetermined time, and blows air from the air outlet 100 of the blower unit 92 onto the wet cover surface by cleaning to dry it, or blows off the adhering moisture to remove it. Let me.

As described above, in the second embodiment of the present invention, pressurized water from the water injection nozzle 40 is sprayed onto the cover surface of the detector cover 26 to clean and remove the adhering dirt at predetermined intervals, and subsequently, the ventilation mechanism is used. By blowing air onto the surface of the cover wet by cleaning to dry or blow off the adhering moisture, it becomes possible to substantially eliminate the adhering of dirt, and the fire is incident on the fire detector 12 due to the dirt. Eliminating the attenuation of incident light, it is possible to continuously maintain the initial flame detection performance, and since dirt does not adhere, cleaning work of the fire detector with tunnel traffic regulation is unnecessary and maintenance is easy. In addition, the cost can be reduced by arranging a transparent detector cover 26 covering the outside of the fire detector 12, and cleaning the cover surface to dry or blow off the attached moisture to remove it. Therefore, the existing fire detector 12 can be installed in the fire extinguishing plug device as it is to eliminate the influence of dirt, and further, the ventilation mechanism 90 is provided as compared with the wiper mechanism 30 of the first embodiment. , Simplifies the structure and enables cost reduction.

By arranging a heater at the outlet of the blower fan 94 or the like to heat the blown air, warm air may be blown onto the cover surface to shorten the drying time.

[Third Embodiment of a fire hydrant device provided with a fire detector]
FIG. 12 is an explanatory diagram showing a third embodiment of a fire detector in which only a cleaning mechanism is provided on the detector cover.

As shown in FIGS. 12, in the third embodiment of the present invention, the point that the transparent detector cover 26 is arranged so as to cover the front surface of the fire detector 12 attached to the storage box 10 is shown in FIGS. 1 to 7. It is the same as the first embodiment, but is characterized in that only a cleaning mechanism provided with a water injection nozzle 40 is provided as a configuration for removing dirt.

The cleaning mechanism is the same as that of the first embodiment, and the water injection nozzle 40 is provided at the tip at a position near the corner on the lower right side of the detector cover 26, that is, a position that does not interfere with the monitoring area of the fire detector 12. The nozzle shaft is fixed to the mounting frame and stands upright, a water supply pipe is connected to the rear end of the nozzle shaft, and a solenoid valve is provided in the middle of the water supply pipe 46.

Similar to the case of the first embodiment, the cleaning mechanism receives a control signal transmitted from the disaster prevention receiving panel at predetermined intervals by the controller, and the controller opens and closes the solenoid valve to drive the water injection nozzle 40. Pressurized water is sprayed onto the cover surface of the detector cover 26 for cleaning.

As described above, the third embodiment of the present invention substantially sprays pressurized water from the water injection nozzle 40 onto the cover surface of the detector cover 26 to clean and remove the adhering dirt at predetermined intervals. It is possible to eliminate the adhesion of dirt, eliminate the attenuation of the incident light incident on the fire detector 12 due to the dirt, maintain the initial flame detection performance continuously, and prevent the adhesion of dirt. Cleaning work of the fire detector with tunnel traffic regulation is not required, maintenance is easy and cost can be reduced, and a transparent detector cover 26 is placed to cover the outside of the fire detector 12 and its cover surface. Since the existing fire detector 12 is installed in the fire hydrant device as it is, it is possible to eliminate the influence of dirt, and since only the cleaning mechanism is required, the structure is simplified. It enables cost reduction.

[Fourth Embodiment of a fire hydrant device provided with a fire detector]
FIG. 13 is an explanatory diagram showing a fourth embodiment of a fire detector in which only a blower mechanism is provided on the detector cover. As shown in FIGS. 13, in the fourth embodiment of the present invention, the point that the transparent detector cover 26 is arranged so as to cover the front surface of the fire detector 12 attached to the storage box 10 is shown in FIGS. 1 to 7. It is the same as the first embodiment, but is characterized in that only the blower mechanism 90 is provided as a configuration for removing dirt.

The ventilation mechanism 90 is the same as that of the second embodiment, and the ventilation unit 92 is arranged at the upper part that does not obstruct the monitoring area of the fire detector 12, and the slit-shaped outlets are arranged side by side at the tip of the ventilation unit 92. The rear part of the blower unit 92 is divided into two parts, and the outlet of the blower fan 94 is connected via the blower hose 96.

The controller provided in the storage box 10 continuously operates and drives the blower fan 94, and blows air from the outlet of the blower unit 92 to the cover surface of the detector cover 26 to form a laminar flow of air. Therefore, the pollutants floating in the air are hindered by the laminar flow of the air and hardly adhere to the cover surface.

As described above, in the fourth embodiment of the present invention, a laminar flow of air is formed on the cover surface to suppress the adhesion of dirt, the attenuation of incident light due to the dirt is eliminated, and the initial flame detection performance can be continuously maintained. In addition, since dirt does not adhere, cleaning work of the fire detector with tunnel traffic regulation is unnecessary, maintenance is easy and cost can be reduced, and the outside of the fire detector 12 is covered. Since the transparent detector cover 26 is arranged, it is possible to install the existing fire detector 12 as it is in the fire hydrant device to eliminate the influence of dirt, and further, only the formation of laminar flow by the blower mechanism 90. Therefore, the structure can be further simplified and the cost can be reduced.

[Fifth Embodiment of a fire hydrant device provided with a fire detector]
FIG. 14 is an explanatory view showing the fifth embodiment of the fire detector provided with the film slide mechanism on the detector cover from the front and the plane, and FIG. 15 shows the front, the plane and the cross section of the detector cover of the fifth embodiment taken out. It is explanatory drawing shown from.

As shown in FIGS. 14, in the fifth embodiment of the present invention, the point that the transparent detector cover 26 is arranged so as to cover the front surface of the fire detector 12 attached to the storage box 10 is shown in FIGS. 1 to 7. Same as the first embodiment, but as a configuration for removing stains, a transparent film sheet is movably arranged on the detector cover 26, and a film slide mechanism for moving the dirty film sheet to a new portion. Is characterized by the provision of.

The film slide mechanism forms a strip-shaped slide groove 102 in the lateral direction of the cover surface of the detector cover 26 facing the light receiving glass window 14 of the fire detector 12, and is wound around a film roller 106 arranged in the box body 10b. The tip of the transparent film sheet 104 is pulled out toward the cover surface side via the guide roller 108 and the slit opening 110, moved along the slide groove 102, and then transferred to the take-up roller 112 via the slit opening 110 and the guide roller 108. The tip is fixed. The take-up roller 112 is mounted on the drive shaft of the take-up motor 114, and by winding the film sheet 104 around the take-up roller 112 by rotationally driving the take-up motor 114, the film sheet 104 is wound along the slide groove 102. It is movable.

As shown in the plane of FIG. 15 (A), the plane of FIG. 15 (B), and the cross section of FIG. 15 (C), the detector cover 26 extends over the center left and right of the cover main body 26a and has a predetermined width of the film sheet 104. A slide groove 102 having a shallow depth of 1 mm or less, which exceeds the thickness of the slide groove 102, is formed, and a slit opening 110 through which the film sheet 104 is passed is formed at the positions of the mounting frame portions 26b on both sides of the slide groove 102.

Here, when the film sheet 104 is arranged in the slide groove 102, if the surface of the slide groove 102 and the film sheet 104 are in close contact with each other, the movement of the film sheet due to the motor winding is hindered. Therefore, the slide groove formed on the cover surface. Vertically protruding portions (height not exceeding the depth of the groove) are formed on both sides of the 102, and the film sheet 104 is arranged so as to be positioned so as to float from the groove surface of the slide groove 102.

In the state where the storage box 10 is installed in the tunnel, the film sheet 104 is located in the slide groove 102 of the detector cover 26 attached so as to cover the front surface of the fire detector 12, and the pollutant substance floating in the air. Adheres to the surface of the film sheet 104 exposed to the outside, and the film sheet 104 becomes dirty with the passage of time.

The disaster prevention receiver 60 shown in FIG. 8 transmits a control signal to the controller of the storage box 10 installed in the tunnel at predetermined periods when the film sheet 104 has become dirty to some extent, for example, every month. The controller rotates the take-up motor 114, winds up the part of the film sheet 104 where the dirt is attached, which is located in front of the detector cover 26, and the new film sheet which is unwound from the film roller 106 and has no dirt attached. Move to the 104 part.

The one-time winding length of the film sheet 104 by the winding motor 114 is the length of the slide groove 102 formed in the lateral direction on the surface of the detector cover 26, that is, the width is added to the heights on both sides of the cover body 26a. The length is set. As a result, the film sheet 104 located in the slide groove 102 on the outer side of the detector cover 26 and having dirt adhered to it can be replaced with a new film sheet 104 to which dirt is not adhered.

As described above, according to the fifth embodiment of the present invention, when the transparent film sheet covering the surface of the detector cover facing the light receiving glass window of the fire detector becomes dirty to some extent, the film sheet is wound to remove the dirt. By moving the part of the film sheet so that it does not come, dirt is removed, the initial flame detection performance can be maintained continuously, and maintenance work is easy because cleaning work of the fire detector with tunnel traffic regulation is unnecessary. In addition, since the film sheet is slidably placed on the transparent detector cover that covers the outside of the fire detector, the existing fire detector can be installed in the fire hydrant device as it is. It is possible to eliminate the influence of dirt.

The detector cover 26 of FIG. 15 forms a slide groove 102, and the film sheet 104 is movably arranged on the slide groove 102, but the slide is opposed to the monitoring area by the light receiving glass window 14 of the fire detector 12. A rectangular opening including a portion of the groove 102 may be formed, and the film sheet 104 may be movably arranged in the slide groove 102 so as to close the front of the opening.

Further, the winding amount of the film sheet 104 to be wound in the lateral direction may be about the width of the fire detector 12.

Further, a film slide mechanism may be provided so that the winding direction of the film sheet 104 is the vertical direction. When the film sheet 104 is fed in the vertical direction, the feed amount when the film sheet 104 becomes dirty can be a small feed amount obtained by adding a predetermined margin to the diameter of the light receiving glass window 14.

Further, the film roller 106 and the take-up roller 112 can be replaced with new ones when the film sheet 104 has been unwound from the film roller 106. Further, when the use of the film sheet 104 is finished, the film roller 106 and the take-up roller 112 may be integrated with the detector cover 26 so that they can be replaced as a detachable structure.

Further, as another embodiment of the film slide mechanism, a structure in which about two film sheets are unfolded and the film surfaces are alternately wound up when the film sheets become dirty may be used. For example, in the case of a left-right winding type film slide mechanism, when a certain period of time elapses using the right side of the film, the film is wound to the right side to expose the left side of the film in front of the light receiving glass window 14, and then a certain period of time elapses. In this case, the film is wound to the left side to expose the right side of the film in front of the light receiving glass window 14, and this is alternately repeated. Here, when the film sheet is wound, the structure is such that the film is wound while removing dirt with a sponge, a brush, or the like that is in contact with the film surface. For example, in the case of the left and right winding type, sponges and the like are arranged at two places, the left end and the right end of the opening where the film sheet is exposed.

[Sixth Embodiment of a fire hydrant device provided with a fire detector]
FIG. 16 is an explanatory diagram showing a sixth embodiment of a fire detector in which a cleaning mechanism and a wiper mechanism are provided on a light receiving glass window.

As shown in FIG. 16, the sixth embodiment of the present invention includes a cleaning nozzle 40 as a configuration for directly removing dirt from the light receiving glass window 14 of the fire detector 12 attached to the storage box 10. It is characterized in that a mechanism and a wiper mechanism 30 are provided.

The fire detector 12 is fixed to the mounting frame 24 in the box body 10b of the storage box 10 and has an opening hole corresponding to the exposed portion of the detector from the front, as in the first embodiment shown in FIGS. 3 to 6. The front panel 10a provided is attached.

Water injection nozzles 40 and wiper mechanisms 30 constituting a cleaning mechanism are provided on both sides of the light receiving glass windows 14 on the left and right sides of the fire detector 12.

The cleaning mechanism has water injection nozzles 40 standing up at positions near the lower left and right corners of the front panel 10a, that is, positions that do not interfere with the monitoring area of the fire detector 12, from the water supply pipe to the fire hydrant device. The branched water supply pipe 46 is drawn into the box body 10b, connected to the roots of the left and right water injection nozzles 40 via the electromagnetic valve 48, and pressurized water is applied to the light receiving glass window 14 of the fire detector 12 by opening the electromagnetic valve 48. Is sprayed to make it possible to clean the dirt adhering to the glass surface.

As the pressurized water jetted from the water injection nozzle 40, the pressurized water taken out from the water supply pipe that supplies the fire extinguishing water to the fire hydrant device from the fire extinguishing pump equipment is used. Further, the water injection nozzle 40 sprays pressurized water onto the cover surface for cleaning prior to the operation of the wiper mechanism.

The wiper mechanism 30 has a wiper drive shaft 35 of the wiper motor 32 provided in the storage box 10 at a position of the front panels 10a on both sides of the light receiving glass window 14, that is, a position that does not interfere with the monitoring area of the fire detector 12. The base of the wiper arm 36 taken out is fixed, and the wiper blade 38 fixed to the tip side of the wiper arm 36 is positioned under the light receiving glass window 14 at the initial position.

When the wiper motor 32 is operated by supplying power, the rotation drive of the motor reverses the rotation direction of the wiper drive shaft 35 within a predetermined rotation angle range, whereby the wiper arm 36 swings and the wiper blade 38 receives light. The glass surface of the glass window 14 is wiped with a wiper blade 38 to wipe off the adhered dirt.

The disaster prevention receiving panel 60 shown in FIG. 8 transmits a control signal for removing dirt to the controller of the storage box 10 installed in the tunnel at predetermined intervals. The controller of the storage box 10 that has received the control signal from the disaster prevention receiving panel 60 outputs the water injection signal three times in succession and opens and closes the electromagnetic valve three times, as shown in FIG. 10A, for example. As a result, pressurized water is sprayed from the water injection nozzle 40 onto the glass surface of the light receiving glass window 14 in three steps to clean the dirt, and then the wiper drive signal shown in FIG. 10B is output for a predetermined time to the wiper motor. 32 is driven, and dirt wet by water spraying on the glass surface is removed by wiping with the wiper mechanism 30, and this is repeated, for example, twice.

Therefore, the dirt adhering to the light receiving glass window 14 of the fire detector 12 is removed by cleaning by spraying pressurized water and wiping the wiper, and by substantially eliminating the dirt adhering, the dirt is incident on the fire detector 12. It eliminates the attenuation of incident light and makes it possible to continuously maintain the initial flame detection performance.

In addition, since dirt does not adhere, cleaning work of the fire detector with tunnel traffic regulation is not required, maintenance is easy, and cost can be reduced. Furthermore, by using the pressurized water filled in the water supply pipe for the fire hydrant device for cleaning the detector cover 26, it is not necessary to separately prepare a supply source for the pressurized water, and the water resources of the fire hydrant device are efficiently used. Enables dirt cleaning.

By mixing the cleaning liquid with the pressurized water ejected from the water injection nozzle 40 and injecting the cleaning liquid, it may be easier to remove the dirt.

[7th Embodiment of a fire hydrant device provided with a fire detector]
FIG. 17 is an explanatory diagram showing a seventh embodiment of a fire detector in which a cleaning mechanism and a ventilation mechanism are provided on a light receiving glass window.

As shown in FIG. 17, the seventh embodiment of the present invention is the same as the sixth embodiment shown in FIG. 16 in that the fire detector 12 is attached to the storage box 10, but is attached to the storage box 10. As a configuration for directly removing dirt from the light receiving glass window 14 of the fire detector 12, a cleaning mechanism provided with a water injection nozzle 40 and a blowing mechanism provided with a blowing unit 92 are provided.

The cleaning mechanism is the same as that of the sixth embodiment of FIG. 16, and the water injection nozzle at the tip is located near the corners on the lower left and right sides of the front panel 10a, that is, at a position that does not interfere with the monitoring area of the fire detector 12. The nozzle shaft provided with 40 is erected, the water supply pipe 46 branched from the water supply pipe for the fire extinguishing plug device is connected to the base of the water injection nozzle 40 via an electromagnetic valve, and the light is received from the water injection nozzle 40 by opening the electromagnetic valve 48. Pressurized water is sprayed onto the glass window 14 for cleaning.

The blower mechanism arranges the blower unit 92 at the position of the front panel 10a on both sides of the fire detector 12 so as not to obstruct the monitoring area, and the blower unit 92 has an outlet toward the light receiving glass window 14 of the fire detector 12. The rear portion of each blower unit 92 is formed and connected to the outlet of the blower fan 94 arranged in the box body via the blower hose 96 and the branch portion 93.

As in the case of the sixth embodiment, the cleaning mechanism operates by opening and closing the solenoid valve 48 when the controller of the storage box 10 receives the control signal transmitted from the disaster prevention receiving panel at predetermined intervals. , Pressurized water is sprayed from the water injection nozzle 40 onto the left and right light receiving glass windows 14 of the fire detector 12 for cleaning.

Subsequently, the controller drives the blower fan 94 for a predetermined time and blows air from the blower unit 92 onto the light receiving glass window 14 of the fire detector 12 which is wet by cleaning to dry or blow off the adhering moisture. To remove.

As described above, in the seventh embodiment of the present invention, pressurized water from the water injection nozzle 40 is sprayed onto the light receiving glass window 14 of the fire detector 12 at predetermined intervals to clean and remove the adhered dirt, and subsequently, By blowing air onto the light receiving glass window 14 of the fire detector 12 that has been wet by cleaning by the ventilation mechanism to dry or blow off the adhering water, it is possible to substantially eliminate the adhering of dirt. , It is possible to maintain the initial flame detection performance continuously by eliminating the attenuation of the incident light incident on the fire detector 12 due to dirt, and since dirt does not adhere, the fire detector with tunnel traffic regulation Cleaning work is not required, maintenance is easy, and the cost can be reduced. Further, compared to the wiper mechanism of the sixth embodiment, the ventilation mechanism is provided, so that the structure can be simplified and the cost can be reduced.

By arranging a heater at the outlet of the blower fan 94 or the like to heat the blown air, the drying time for blowing warm air onto the surface of the light receiving glass window 14 may be shortened.

[Eighth Embodiment of a fire hydrant device provided with a fire detector]
FIG. 18 is an explanatory diagram showing an eighth embodiment of a fire detector in which only a cleaning mechanism is provided on a light receiving glass window.

As shown in FIG. 18, the eighth embodiment of the present invention is the same as the sixth embodiment shown in FIG. 16 in that the fire detector 12 is attached to the storage box 10, but is attached to the storage box 10. As a configuration for directly removing dirt from the light receiving glass window 14 of the fire detector 12, only a cleaning mechanism provided with a water injection nozzle 40 is provided.

The cleaning mechanism is the same as that of the sixth embodiment, and the water injection nozzle 40 is provided at the tip at two locations near the left and right lower corners of the front panel 10, that is, at positions that do not interfere with the monitoring area of the fire detector 12. The provided nozzle shaft is erected, a water supply pipe 46 is connected to the base of the water injection nozzle 40, and a solenoid valve 48 is provided in the middle of the water supply pipe 46.

As in the case of the sixth embodiment, the cleaning mechanism operates by opening and closing the solenoid valve 48 when the controller of the storage box 10 receives the control signal transmitted from the disaster prevention receiving panel at predetermined intervals. , Pressurized water is sprayed from the water injection nozzle 40 onto the left and right light receiving glass windows 14 of the fire detector 12 for cleaning. The washing water adhering to the glass surface disappears by natural drying.

As described above, in the eighth embodiment of the present invention, the pressurized water from the water injection nozzle 40 is sprayed on the left and right light receiving glass windows 14 of the fire detector 12 at predetermined intervals to clean and remove the adhered dirt. It is possible to substantially eliminate the adhesion of dirt, the attenuation of the incident light incident on the fire detector 12 due to the dirt is eliminated, the initial flame detection performance can be continuously maintained, and the adhesion of dirt occurs. Since there is no such thing, there is no need to clean the fire detector with tunnel traffic restrictions, maintenance is easy and the cost can be reduced, and since only the cleaning mechanism is required, the structure can be simplified and the cost can be reduced. And.

[9th embodiment of a fire hydrant device provided with a fire detector]
FIG. 19 is an explanatory diagram showing a ninth embodiment of a fire detector in which only a ventilation mechanism is provided in a light receiving glass window.

As shown in FIG. 19, the ninth embodiment of the present invention is the same as the sixth embodiment of FIG. 16 in that the fire detector 12 is attached to the storage box 10, but the fire detection is attached to the storage box 10. As a configuration for directly removing dirt from the light receiving glass window 14 of the vessel 12, only a ventilation mechanism is provided.

The blower mechanism is the same as that of the seventh embodiment shown in FIG. 17, and the blower units 92 are arranged on both sides of the fire detector 12 that does not interfere with the monitoring area, and the blower unit 92 is the fire detector 12. An outlet is formed toward the light receiving glass window 14, and the rear portion of each blower unit 92 is connected to the outlet of the blower fan 94 arranged in the storage box 10 via the blower hose 96 and the branch portion 93.

The controller provided in the storage box 10 continuously operates and drives the blower fan 94, and blows air from the outlet of the blower unit 92 to the light receiving glass window 14 of the fire detector 12 to form a laminar flow of air on the glass surface. is doing. Therefore, the pollutants floating in the air are hindered by the laminar flow of air and hardly adhere to the glass surface of the light receiving glass window 14.

As described above, in the ninth embodiment of the present invention, a laminar flow of air is formed in the light receiving glass window 14 of the fire detector 12, the adhesion of dirt is suppressed, the attenuation of the incident light due to the dirt is eliminated, and the initial flame detection is performed. Performance can be continuously maintained, and since dirt does not adhere, cleaning work of the fire detector with tunnel traffic restrictions is not required, maintenance is easy and cost can be reduced, and the ventilation mechanism Since only the laminar flow is formed by the above method, the structure can be further simplified and the cost can be reduced.

[Modified example of the present invention]
The detector cover 26 arranged so as to cover the front surface of the fire detector 12 in the above embodiment has the entire cover transparent, but has a cover surface corresponding to the monitoring area seen from the light receiving glass window 14 of the fire detector 12. For example, the rectangular portion including the range may be a transparent window cover, the other portion may be opaque, and the opaque cover portion may be made by sheet metal processing or the like.

Further, the present invention includes appropriate modifications that do not impair its purpose and advantages, and is not further limited by the numerical values shown in the above embodiments.

10: Storage box 12: Fire detector 14: Light receiving glass window 16: Test light source storage part 18: Waterproof connector 24, 44: Mounting frame 26: Detector cover 30: Wiper mechanism 32: Wiper motor 34: Shaft case 35: Wiper Drive shaft 36: Wiper arm 38: Wiper blade 40: Water injection nozzle 42: Nozzle shaft 46: Water supply pipe 48: Electromagnetic valve 50: Controller 60: Disaster prevention receiving panel 62: Fire extinguishing pump equipment 90: Blower mechanism 92: Blower unit 94: Blower fan 96: Blower hose 98: Straightening plate 100: Outlet 102: Slide groove 104: Film sheet 106: Film roller 108: Guide roller 110: Slit opening 112: Winding roller 114: Winding motor

Claims (5)

It is a fire detector that is attached to a storage box installed in a tunnel and detects a fire in the monitoring area by observing the radiation energy radiated from the combustion flame incident through the light receiving glass window.
A detector cover that is arranged so as to cover the outside of the front surface of the storage box and has at least a predetermined portion facing the light receiving glass window as a transparent portion.
Water supplied from the water injection nozzle to the surface of the cover including the transparent portion of the detector cover through a pipe branched and connected to the water supply pipe of the fire hydrant device is driven by opening a solenoid valve arranged in the middle of the pipe. A cleaning mechanism that sprays and cleans,
A blower mechanism that blows air to at least the portion of the cover surface where the water injection nozzle ejects water.
A control unit that drives the ventilation mechanism for a predetermined time after the cleaning mechanism drives the opening and closing of the solenoid valve.
Equipped with
The blower mechanism is a fire detector including a heater for heating the blown air .
It is a fire detector that is attached to a storage box installed in a tunnel and detects a fire in the monitoring area by observing the radiation energy radiated from the combustion flame incident through the light receiving glass window.
A detector cover that is arranged so as to cover the outside of the front surface of the storage box and has at least a predetermined portion facing the light receiving glass window as a transparent portion.
A cleaning mechanism for cleaning the surface of the detector cover including the transparent portion by injecting water from a water injection nozzle.
The air blower unit for sending out air and the air blower supply unit for supplying air from the air blower unit to the cover surface are arranged in the storage box, and the air blower is supplied to at least a portion of the cover surface where the water injection nozzle injects water. A ventilation mechanism that blows the air supplied from the unit almost evenly,
A control unit that drives the ventilation mechanism for a predetermined time after the water injection by the cleaning mechanism is completed.
A fire detector characterized by being equipped with.
It is a fire detector that is attached to a storage box installed in a tunnel and detects a fire in the monitoring area by observing the radiation energy radiated from the combustion flame incident through multiple light receiving glass windows.
Cleaning by injecting water supplied from the water injection nozzle to the surface of the light receiving glass window through a pipe branched and connected to the water supply pipe of the fire extinguishing plug device by opening the solenoid valve arranged in the middle of the pipe to clean it. Mechanism and
A ventilation mechanism that blows air onto the surface of the light receiving glass window,
A control unit that drives the ventilation mechanism for a predetermined time after the cleaning mechanism drives the opening and closing of the solenoid valve.
Equipped with
The cleaning mechanism includes a plurality of the water injection nozzles corresponding to each of the plurality of light receiving glass windows.
The blower mechanism is a fire detector including a plurality of the blower supply units corresponding to each of the plurality of light receiving glass windows .
It is a fire detector that is attached to a storage box installed in a tunnel and detects a fire in the monitoring area by observing the radiation energy radiated from the combustion flame incident through multiple light receiving glass windows.
A cleaning mechanism that injects water from a water injection nozzle to clean the surface of the light receiving glass window.
A blower unit that sends out air and an air blower supply unit that supplies air from the air blower unit to the surface of the light receiving glass window are arranged in the storage box, and the air supplied from the air blower supply unit is placed on the surface of the light receiving glass window. The ventilation mechanism that blows and
A control unit that drives the ventilation mechanism for a predetermined time after the water injection by the cleaning mechanism is completed.
Equipped with
The cleaning mechanism includes a plurality of the water injection nozzles corresponding to each of the plurality of light receiving glass windows.
The blower mechanism is a fire detector including a plurality of the blower supply units corresponding to each of the plurality of light receiving glass windows .
In the fire detector according to claim 2 to 4 ,
The blower mechanism is a fire detector including a heater for heating the blown air.

Images